2022-07-23

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补充了一个numpy concatenate用法

补充了一个numpy concatenate用法，写在 preview 🔗 [2021-11-02 - Truxton's blog] https://truxton2blog.com/2021-11-02/#Numpy数组操作reshape_concatenate_vstack_等

Chromagram smoothing

Chromagram smoothing

从这里开始：

为此需要阅读原书P375

总之就是：先做Quantization，然后用smoothing window做平滑 . smoothing window就是以前学过的那些常见的hann, hamming, blackman ...

就这样结束了？大概是的。

但实际上还不止smoothing window，还使用了其他方法：🔗 [C3S1_FeatureSmoothing] https://www.audiolabs-erlangen.de/resources/MIR/FMP/C3/C3S1_FeatureSmoothing.html

方法1：使用boxcar的smoothing：

方法2：使用Median Filtering（中值滤波器）：

🔗 [图像处理学习笔记（十三）——平滑处理(中值滤波法)(理论篇) - 知乎] https://zhuanlan.zhihu.com/p/343591732

Concrete example:

🔗 [中值滤波器 - 维基百科，自由的百科全书] https://zh.wikipedia.org/zh-hans/中值滤波器